Question

У сплаві міді з оловом 45% становить мідь. Скільки кілограмів міді містить злиток такого сплаву масою 18 кг?

Answer 1

18кг / 100% = 0.18
0.18 * 45= 8,1кг
Ответ: 8.1 кг меди будет содержать 18 кг сплава меди и олова (бронзы)

Answer 2

Calculation of the Amount of Copper in the Alloy

To calculate the amount of copper in the alloy, we need to use the given information that the alloy is composed of 45% copper. We are also given the mass of the alloy, which is 18 kg.

To find the mass of copper in the alloy, we can use the following formula:

Mass of Copper = Percentage of Copper × Mass of Alloy

Substituting the given values into the formula, we get:

Mass of Copper = 45% × 18 kg

To calculate this, we need to convert the percentage to a decimal by dividing it by 100:

Mass of Copper = 0.45 × 18 kg

Now we can calculate the mass of copper:

Mass of Copper = 8.1 kg

Therefore, the alloy contains 8.1 kilograms of copper.